<template>
    <el-upload
        class="img-upload"
        ref="upload"
        action="http://localhost:8805/library/covers"
        :on-preview="handlePreview"
        :on-remove="handleRemove"
        :before-remove="beforeRemove"
        :on-success="handleSuccess"
        multiple
        :limit="1"
        :on-exceed="handleExceed"
        :file-list="fileList">
        <el-button size="small" type="primary">点击上传</el-button>
        <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
    </el-upload>
</template>

<script>
    export default {
        name: 'ImgUpload',
        data () {
            return {
                fileList: [],
                url: ''
            }
        },
        methods: {
            handleRemove (file, fileList) {
            },
            handlePreview (file) {
            },
            handleExceed (files, fileList) {
                this.$message.warning(`当前限制选择 1 个文件，本次选择了 ${files.length} 个文件，共选择了 ${files.length + fileList.length} 个文件`)
            },
            beforeRemove (file, fileList) {
                return this.$confirm(`确定移除 ${file.name}？`)
            },
            handleSuccess (response) {
                this.url = response
                this.$emit('onUpload')
                this.$message.warning('上传成功')
            },
            clear () {
                this.$refs.upload.clearFiles()
            }
        }
    }
</script>
